Doctors shared stories on AskReddit about the rarest diseases they’ve encountered. It’s an X-linked recessive disease that a quick Google search tells me affects about 1 in every 400,000 individuals. I live in a really poor part of an already poor country. This disease is really common in my region, but really rare in other parts, especially non-tropical countries like the US. The patient had Hers Disease, a genetic disorder that makes you produce less Glycogen due to an enzyme defect.